Steam boiler



STEAM BOILER Filed Dec. 21, 1935 JJ 5 Lt JM v 6 ffl/I! 61 7 2 3 f Jl .4 I l .r H 91 W m fy|f oo l* 1 26 Q 1 R 7 1 Patented ug. 17, 1937 vre stares STEAM BORDER Application December 21, 1335, Serial No. 55,601

3 Claims.

The present invention pertains to a novel steam boiler designed preferably, but not necessarily, for use in connection with an oil burner. The principal object of the invention is to provide a simple and efficient device of this character having large water heating surfaces and a construction for super-heating the steam. Other features of the invention include a booster line for pressure feed of fuel to an oil burner and a water l0 guard for preventing the entrance of water into the steam drawn oi from the boiier.

The boiler includes a shell in which is formed a water tight chamber for conducting hot gases from an oil burner or other source of heat. Steam is collected in a system above the Water level and is returned downwardly into the chamber for super-heating. It is withdrawn from a lower point in the chamber to the outlet pipe leading to radiators or other points of use. This delivery pipe receives the i'lnal gas exhaust pipe so that the heat in the exhaust gas may also be utilized.

Other objects and features of the invention will appear as the description proceeds.

The invention is fully disclosed by way of example in the following description and in the accompanying drawing in which Figure l is a vertical section of the device;

Figure 2 is a plan section taken at the lower part of the boiler, and

Figure 3 is a plan section taken at the upper part of the boiler.

Reference to these views will now be made by use of like characters which are employed to designate the corresponding parts throughout.

In Figure l the numeral l designates the shell of the boiler having an opening E in its bottom and its top covered by a dome 3 after the inner assembly has been completed. The opening 2 is designed to accommodate an oil burner of any suitable construction for the purpose of generating steam within the apparatus as will presently be described.

A hollow core or drum 4 rests on a ring 5 in the bottom of the shell l. A conical chamber member (i is secured to a neck l at the top of the drum 4. The member t3 is covered by an annular plate 8 to which is secured an upwardly extending tube E for a purpose that will presently be described. Further, a tube l is secured to the member 6 over the neck 'l and extends con centrically into the tube Q as clearly illustrated in Figure l. The hot gases generated by the burner at the opening 2 rise in the drum 4 and inner tube Il).

Vent plugs ll and l2 are mounted the rst in the dom-e 3 and the second on tube 9 are controlled by cables i2 and i3 passing over suitably posiitoned pulleys ifi and l5. The plugs or traps are opened only for the purpose of permitting the cold air in the apparatus to escape during starting, and are immediatelyclosed when heat is generated. Thereafter, the hot gases pass i from tube it downwardly through tube 9 to the chamber the top of tube 9 being closed by plate l2.

Vertical 'fire tubes it are mounted in the plate 3 and in another horizontal plate l'i' supported near the base of the dome 3. The hot gases rise from chamber 6 through the re tubes and into the dome 3 from which they escape through a pipe i8.

Cold water is admitted to the water space in the boiler through a pipe i8 entering the dome 3 and there formed as a spiral i9, the lower end of the spiral being continued as a pipe line 2) entering the shell l and extending to the bottom thereof as indicated by the numeral 2l. Thus, the entering cold water is heated at substantially the point of entry or Very near thereto.

The steam generated in the boiler is collected in a horizontal ring-shaped pipe 22 surrounding the re tubes i6 above the water level and formed with openings 23 for the admission of steam thereto. A separating plate 24 extending beneath the tube 22 prevents entry of moisture into the openings 23.

From the pipe 22 the dry steam enters another spiral 25 in the dome 3 and flows downwardly in a coil 255 in the tube 9. The steam is then carried upward in a pipe 2l leading from the bottom of the coil to an external line 28 communicating with the final outlet pipe 29 enclosing the exhaust pipe le to heat the steam further from the eX- haust. The steam, as it flows through the coil 2S, is superheated.

A line 3@ of comparatively small diameter is tapped into the spiral 25 and carried into the inner tube Ill where it is formed as a coil 3| and is then continued into the drum fi in the form of a wider coil 32. From the lower end of the coil, the line is continued as at 33 to the supply side of the oil burner (not shown) to force the fuel mixture through the burner under pressure.

This extension 33 may be connected to the fuel tank or to any other desired point in the fuel supply line.

Water tubes bottom of the drum i to increase the circulation of water through the. hot gases in the drum. A

34 are mounted in the top and safety Valve 35 is steam line 28.

` Although a specic embodiment of the invention has been illustrated and described, it will be understood that Various alterations in the details of construction may be made without departing from the scope of the invention, as indicated by the appended claims.

What We claim is:-

1. In a boiler, a shell, a water-sealed drum in said shell and having a gas inlet in its bottom, water tubes passing through the top and bottom of said drum, a tube extending vertically from the top of said drum and in communication there with, a chamber member enclosing the lower part of said tube and having its top formed with an opening around said tube, another tube secured in said opening and enclosing the remainder of the rst-named tube in spaced reiation thereto, a plate surrounding the top of the second tube, tubes extending from the top of said chamber member through said plate, and means forlclosing the upper end of the second tube said chamber member having its bottom joined to the lower part of the first-named tube and the upper part of said drum. i

Y 2. In a boiler, a shell, a water-sealed 'drum in said shell and having a gas inlet in its bottom, water tubes passing through the top and bottom of said drum, a tube extending vertically from the top of said drum and in communication therewith, a chamber member enclosing the lower part of said tube and having its top formed with an opening around said tube, another tube secured in said opening and enclosing the repreferably mounted in the mainder of the iirst-named tube in spaced relation thereto, a plate surrounding the top of the second tube, tubes extending from the top of saidv chamber member through said plate, and means for closing the upper end of the second tube, a steam collector pipe beneath said plate, a coil extending from said pipe into the space between said tubes, and an outlet pipe extending from` the lower end of said coil said chamber member having its bottom joined to the lower part of the rstnamed tube and the upper part of said drum.

3. In a boiler, a shell, a water-sealed drum in said shell and having a gas inlet in its bottom, water tubes passing through the top and bottom of said drum, a tube extending vertically from the top of said drum and in communication therewith, a chamber member enclosing the lower part of said tube and having its top formedl with an opening around said tube, another tube secured in said opening and enclosing the remainder of the first-named tube in spaced relation thereto, a plate surrounding the top of the second tube, tubes extending from the top of said chamber member through said plate, andmeans for closing the upper end of the second tube, a steam collector pipe beneath said plate, a coil extending from said pipe into the space between said tubes, and an outlet pipe extending from the lower end of said coil, and a booster pipe extending from said collector pipe and coiled in the first-named tube and in said drum said chamber member having its bottom joined to the lower part of the firstnamed tube and the upper part of said drum.

PAUL POTHIER. EDMOND VIGNEAULT. 

